KR0184314B1 - Generation device for character and picture data - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for displaying binary bit matrix data of character synonym as multi-gradation data, and more particularly, to a display method and apparatus for reducing line flicker due to interlaced scanning. Using the font as it is, and generating the multi-gradation data suppressing the vertical luminance change in a simple way without changing the size of the font matrix, and realizing high resolution binary image display with reduced flicker even in the interlaced scanning method It is intended to do. In the configuration, for each pixel of the bit matrix, the pixel using the data of this pixel and at least one bit matrix data adjacent to the pixel in the vertical direction or predetermined data when there is no adjacent pixel. The calculation is performed based on the weighting coefficient corresponding to the distance from the data to generate multi-gradation data, which is then written to the frame memory. In addition, it is characterized by converting the drawn multi-gradation data into a predetermined foreground color, a background color, and a middle color thereof, and as a result, a smooth vertical luminance change can be achieved even in a high-resolution character font, thereby reducing flicker. have.

Description

Multi gradation character, image data display method and device

1 is a system block diagram for displaying text and image data of multi-gradation in the first embodiment of the present invention.

2 is a flowchart of the CUP in FIG.

FIG. 3 is a diagram showing the correspondence between a filter calculation by bit pixel data of one pixel * two rows in the multi-gradation data generating means of FIG. 1 and the generated multi-gradation data and display color;

4 is a diagram showing original characters and characters outputted as video signals on a screen according to the first embodiment;

FIG. 5 is a diagram explaining a calculation method using bit matrix data of one pixel x three rows, two pixels x rows, and three pixels x three rows as a filter calculation method.

6 is a diagram showing multi-tone characters obtained by filter operation with one pixel x three rows.

Fig. 7 is a diagram showing multi-tone characters obtained by filter operation with 2 pixels x 2 rows.

FIG. 8 is a block diagram of a system that enables a combination of a plurality of background colors and foreground colors in the bit matrix display in the embodiment of FIG.

FIG. 9 is a view showing a method of converting multi-gradation character data into drawing data in the system of FIG. 8 and a correspondence of a color map to a display color of the converted data. FIG.

Fig. 10 is a block diagram of a system having a full-color frame memory in which colormap conversion is performed when drawing multi-gradation data generated from binary bitmetric data.

FIG. 11 is a system block diagram of a system having a full-color frame memory in which color bitmap conversion of binary bitmetric data is performed first and then filter operation is performed.

* Explanation of symbols for main parts of the drawings

101: CUP 102: Font ROM

103: multi-row data storage means 104: multi-gradation data generating means

105: frame memory 106: display reading control means

107: color map conversion means 108: D / A conversion means

109: FAX reception control unit 110: buffer memory

801: data conversion means 1001: color development means

1033: address decode circuit 1101: color data storage means

1102: means for generating multi-gradation data 1031,1032: row register

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for displaying binary bit matrix data such as characters as multi-gradation data, and more particularly, to a display method and apparatus for reducing line flicker due to interlaced scanning.

In recent years, a system using a home television as an information terminal, such as a home shopping system, has been increasing. In such a system, character information such as an operation menu is displayed on a television screen.

The normal font is configured as a binary bit matrix, and is displayed on the television screen as a dot matrix of two colors, for example, black (background color) and white (foreground color). However, the following problem occurs when displaying characters in monochrome on a television screen. This is due to the television scanning method. In interlaced scanning, when characters or the like with a large change in vertical luminance are displayed, screen flicker, called flicker, occurs, causing discomfort to the viewer. In particular, in the case of displaying high-resolution characters, the display color (chromaticity) is different for each line, so that the change in luminance in the vertical direction tends to be severe. Thus, in the past systems, only low resolution display by large character fonts has been realized. Flicker is due to interlaced scanning of 30 HZ per frame (field frequency is 60 HZ). Increasing the scan per frame to about 60 Hz twice would not be perceived by human vision. In order to realize this, it is necessary to use non-interlaced scanning, or bemyl interlaced scanning in which the vertical frequency is increased twice (120 hz). However, this method leads to a significant increase in cost, accompanied by widespread use of scanning diseases and circuits as display devices. On the other hand, flicker can be reduced as long as the vertical luminance change can be smoothed even in interlace scanning. This is evident from the fact that flicker does not occur in a normal television image or the like, but for this purpose, a process of suppressing the luminance change between successive lines is required. Usually, in order to smooth the luminance between lines, a vertical low pass filter is often applied during raster scanning. However, this method requires a plurality of lines of beeper memory and its control circuit to process one line, resulting in an increase in circuit size. In addition, the sharpness is sacrificed in the whole screen in order to reduce flicker. Therefore, as a process for suppressing the change in the vertical lightness, it is preferable to limit the image area to the image quality deterioration.

As a thing which can be limited to such a character area part, there exist the following US patent.

U, S, Pat, No. 4454506, Sep. 4, 1981, METHOD AND CIRCUILITY FOR REDUCING FLICKER IN SYMBOL DISPLAYS The luminance difference of the character font signal is detected, and when the luminance difference is greater than or equal to a predetermined size, the adjacent character font signal level is controlled so that the luminance change is smooth. However, the above-described method requires the processing circuit at the raster scanning speed or the problem that the character area is not explicit during the raster scanning since the recent display device adopts the method of writing the character pattern in the frame memory. Have In the above-described method, in order to change the scanning line signal adjacent to the character font signal to be scanned, the original character font is not deformed, but the upper and lower regions thereof are changed, and the character font size is different. This becomes a problem when writing to the frame memory. This is because changing the size of the character font complicates the rendering process such as management of inter-character space. On the other hand, in order to reduce flicker, the character font is not binary but also has a semi-low tide in advance. This technique is described, for example, in (1) Proceedings of the Conference SIGGRAPH '80, The Display of Characters Using Gray Level Sample Arrays, by J. E. Warnock, July, 1980, pp. 302-307

(2) Proceedings, Society for Information Display, by N. Negroponte, 980. However, these methods need to have halftone character fonts on the television receiver side, and the problem is that they become quite large as capacity.

In view of the above, the present invention uses a conventional binary font as it is, and generates multi-tone data in which the vertical luminance change is suppressed by a simple method without changing the font matrix size, and also in the interlaced scanning method. It is an object to realize high resolution binary image display with reduced flicker. In order to achieve the above object, according to the present invention, for each pixel of the number of bit matrices, the data of this pixel and at least one bit matrix data adjacent to the pixel in the vertical direction, or predetermined data in the absence of adjacent pixels. Is calculated using the weighting coefficient corresponding to the distance from the pixel to generate multi-gradation data, which is then written to the frame memory. In addition, the drawn multi-gradation data is converted into a predetermined foreground color, a background color, and an intermediate color thereof for display. As a result, even in high-resolution fonts, smooth vertical luminance changes, thereby reducing flicker. In the present invention, since the processing can be limited only to a bit matrix data area such as a character having a possibility of flickering, the sharpness of other portions of the image is not volatilized. In addition, since multi-gradation data is generated not as a raster scan but as a preprocessing for drawing to the frame memory, there is no significant increase in hardware scale as in the prior art. In addition, since it is a preprocessing of drawing, only software processing can be realized. In addition, since the generated data becomes the same as the original matrix size, there is no change of the space between characters, and the writing process is not complicated. According to the present invention, when the multi-gradation data is changed again to assign a predetermined display color in color map conversion, not only text display by white and black and its intermediate color, but also a combination of background color and foreground color other than black and white can be displayed. . The same effect can be obtained not only when the color map conversion is used but also when the reduction filter operation is performed between the adjacent data in the vertical direction or the horizontal vertical direction after the conversion to the display color. The present invention can also achieve the same effect with black and white image data such as a facsimile. In other words, the data received by the facsimile is bit matrix data. When the data is processed by the above-described method, the facsimile image can be displayed on the television screen of the interlaced scanning method. In addition, similar effects can be obtained with image data composed of binary. Best Mode for Carrying Out the Invention Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

Example 1

First, the first embodiment of the present invention will be described using FIG. 1, FIG. 2, FIG. 3, and FIG.

1 is a block diagram showing the internal structure of a system for displaying multi-gradation characters and image data of the present invention. In the same figure, the CUP 101 controls the entire system.

The font ROM 102 stores character fonts composed of binary bit matrix data. The multi-row data storage unit 103 stores data for two rows of the bit matrix data of the font ROM 102, and controls data recording by the row registers 1031 and 1032 and the CUP 101. The address decode circuit 1033 is configured. In this embodiment, the data of the CUP 101 is supplied to the row register 1031 and the row registers REG 1 and 1031 are supplied to the row register 1031 by the signal decoded by the address decoding circuit 1033. It is assumed that a FIFO type register structure for shifting and storing stored data is employed. That is, the row register 1032 always holds data on one row of the row registers 1031 and (REGO). In addition, the row registers 1031 and 1032 store eight pixels of data as shown in Fig. 3A. The multi-gradation data generating means 104 performs filter operation based on equation (1) for each pixel shown in Fig. 3A. (REGO generation data) = REGO pixel data + REG1 pixel data ... (1) Since the data of REG O and RER1 is 1 bit / pixel, the combination of the discrete operations is shown in Fig. 3 (b). One table. In this embodiment, it is assumed that the table shown in FIG. 3 (b) is realized by the ROM rather than the operation. The generated data is 2-bit / pixel multi-gradation data having a value of 0-2 as shown in Fig. 3C. Therefore, as a ROM size, it can implement | achieve by the small capacity of 4 trillion x 2 bits (8 bits) per pixel.

The frame memory 105 is a memory for writing the data generated by the CUP 101 by the multi-gradation data generating means 104. The display read control means 106 reads out the data in the frame memory 105 in the raster order by unlaced scanning. The color map converting means 107 converts the data of the frame memory to be read in raster order into RGB digital color data, and the D / A converting means 108 converts RGB digital data into an analog color image. To convert it into a signal.

The FAX reception control unit 109 receives the FAX data from the telephone line and extracts the binary bit matrix data, and the buffer memory 110 is a memory that stores the extracted binary FAX image data. In this embodiment, a processing example is described for two pieces of character font and FAX image data as binary bit matrix data. (STEP 201) Since the CUP 101 does not have adjacent upstream matrix data with respect to the first type of character data, the CUP 101 sets a default pattern 0 for the row register (REGO) 1031, for example. (STEP202) The CUP 101 sequentially reads the font data to be drawn from the font ROM 102 in units of 8 bits. When the horizontal size of the font is 8 bits or more, the following processing may be repeated in 8 bit units. (STEP203) The CUP 101 writes the read 8-bit font data into the row register (REGO) 1031. At this time, in the multi-row data storage means 103, the data stored in the row register (REGO) 1031 is shifted to the row register (REG 1) 1031 by the FIFO row register configuration. That is, the row registers REGO 1031 and the row registers REG 1 and 1032 always store two consecutive rows of data. (STEP204) The multi-gradation data generating means 104 performs filter operation using two row registers in the multi-row data storage means 103. Specifically, the row data of the row registers (REGO) 1031 and the row registers (REG 1) 1032 as shown in FIG. Input as the ROM address, and the data output from the ROM as the calculation result. At this time, if there are eight sets of ROM shown in Fig. 3 (b), it is possible to generate multi-tone data for eight pixels in parallel. Also in this case, the ROM size required for the calculation is about 8 x 8 (64) bits. (STEP205) The CUP 101 reads the calculation result from the multi-gradation data generating means 104 and writes it to the frame memory 105. (STEP206) The CUP 101 repeatedly executes the processing of STEP202-205 to the last line of the font. Although 0 is set as the default pattern in STEP201 in the flowchart of FIG. 2, 1 may be sufficient. In step 203, when the font line is arranged from the top of the font to A, B, C .... in turn, the combination of the font data of two consecutive lines is a group of sequentially shifted data as follows.

(1st row generation data) = Low pass filter operation (0, A)

(2nd row generation data) = Low pass filter operation (A, B)

(3rd row generated data) = Low pass filter operation (B, C)

(4th row generation data) = Low pass filter operation (C, D)

Therefore, in the multi-row data storage means 103, when the new row data is written, a FIRO type register structure that sequentially shifts the row data stored in advance of one row is used. By simply setting, it is possible to hold two rows of row data required for processing. Therefore, it is not necessary to set the row data for two rows each time, and the writing speed can be realized at a speed similar to that of a normal character drawing process. In the flowchart of FIG. 2, the processing is performed in units of 8 bits per row. However, the processing size per row is not limited to 8 bits and can be realized in any bit width. The processing size per line is not limited by the size of the bit matrix such as font. In step 205, the data drawn in the frame memory 105 by the CUP 101 is multi-gradation data of 2 bits per pixel, so that the frame memory 105 requires a memory configuration of at least 2 bits per pixel. do.

The multi-gradation data drawn in the frame memory 105 by the above steps is read out by interlaced scanning by the display reading control means 106, and converted into RGB color data by the color map converting means 107. The D / A converter 108 outputs the analog video signal to the monitor. The converted value in the color map converting means 107 is a conversion value of 0 as a background color, a conversion value of 2 as a foreground color, and a conversion value of 1 as its intermediate color as previously shown in FIG. 3 (d) by the CUP 101. Set to the corresponding value. The conversion value to the intermediate color is, for example, taking the luminance level of the multi-gradation data generated on the horizontal axis as shown in FIG. 3 (d) and the color data after the color map conversion on the vertical axis, and connecting the luminance levels of the background color and the foreground color in a straight line. Set the book of intersections. In addition, it is also possible to obtain the intermediate color by connecting the luminance levels of the background color and the foreground color to a curve considering the gamma correction of the television monitor instead of a straight line. As a result, conventionally, the character data displayed in two colors of the background color and the foreground color as shown in FIG. 4 (a) is used as the middle color in the vertical outline portion as shown in FIG. It can be made to be an arrogant mark. In addition, the halftone character as shown in FIG. 4 (b) has a feature that there is no visual discomfort due to the spatial frequency characteristic (low pass type with low high frequency sensitivity) of the human visual system. The characters in FIG. 4 (b) generated as multi-gradation data are the same as the original size in FIG. 4 (a). Therefore, writing processing such as changing the space between characters, which has been a problem of the conventional apparatus, is not complicated. As the bit matrix data, not only the character font but also the binary accumulated in the buffer memory 110 via the FAX reception control unit 109 is stored in the frame memory 105 in the same order as shown in FIG. You can also draw. At this time, the entire FAX image stored in the beeper memory may be treated in the same manner as in the character font. In the processing of STEP202-204 using the multi-row data storage means 103 or the multi-gradation data generating means 104, the ROM contents shown in FIG. 3 (b) are mounted in a conversion table or the like, and the row registers are used. By alternately replacing the variables storing the newly read row data with (1301) and (1302) as two variables, FIFO control can be easily implemented, and the software by the CUP 101 is sufficiently realized at a practical speed. It is possible. In addition, in the present embodiment, the filter calculation method in the multi-gradation data generating means 104 has been described in terms of the calculation by the [1,1] filter coefficients for the bit matrix data for one horizontal pixel and two vertical rows. Other calculation methods as shown in Figs. (A), (b) and (c) may also be used. FIG. 5 (a) shows a filter operation using [1, 2, 1] filter coefficients using matrix data of three pixels of one pixel and three rows of horizontal lines. Here is an example using a line: At this time, the multi-row data storage means 103 needs to have three rows of row registers. Compared to the calculation by the [1,1] filter coefficient using two rows of data, it becomes five gradation data (3 bits / pixel) of 0-4. Therefore, from the character font as shown in FIG. The multi-gradation data shown in Fig. 6B is generated, and the vertical luminance change can be further suppressed. However, in order to realize the filter operation in the ROM table, the capacity is increased to a 24-bit capacity of 8 trillion x 3 bits per pixel. FIG. 5B is a case where two-dimensional filter operation is performed on bit matrix data of two horizontal pixels and two vertical rows. The generated multi gradation data is 5 to 4 gradation data (3 bits / pixel). At this time, the multi-row data storage means 103 can be composed of two rows of row registers as in Fig. 1, but when the multi-gradation data generating means 104 is composed of ROM, the size is 16 trillion per element × Three bits of 48 bits of capacity are required. As the generated character, it is also smoothed in the horizontal direction as shown in FIG. 7 (b). 5 (c) is an example of the filter coefficient in the case of performing two-dimensional filter operation on bit matrix data of three horizontal pixels and three vertical rows. However, in any of the fifth (a), (b) and (c), the matrix size recorded in the frame memory 105 is the same as the original font size.

In this way, the present invention does not particularly limit the number of pixels for performing the filter operation. However, the number of pixels to be subjected to the filter operation affects the circuit size or processing time by software depending on the operation. For example, if only the line polykey in the interlace scanning method is reduced, the filter operation for two vertical rows shown in Fig. 1 is sufficient.

As described above, as the preprocessing of the drawing, the low-pass filter operation is performed on the bit matrix data, and the multi-gradation data is generated to display the background color, the foreground color, and the middle color, so that the display in which the luminance change in the vertical direction is smoothed can be realized. have. As a result, character display with reduced flickering becomes possible on the monitor of the interlace scanning method. Similarly, when the binary FAX image is processed instead of the character font data, a facsimile image with reduced flicker can also be displayed on an interlaced scanning television. In addition, similar image effects can be obtained as long as image data composed of two colors.

Example 2

In Example 1, the combination of the background color and foreground color which comprise a character was 1 set (white and black in the description of Example 1). Therefore, in the second embodiment of the present invention, a system capable of displaying a plurality of text colors while reducing flicker will be described using FIG. In addition, in Embodiment 2, about the structural part which has a function similar to the said Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted. 8 is a block diagram showing the internal structure of a multi-gradation character and an image data display device of the present invention. In the figure, the data converting means 801 converts the generated data of the multi-gradation data generating means 104 so as to assign a display color for a plurality of combinations of the foreground color and the background color. In this embodiment, the background data of the character data to be drawn is added as an offset as data conversion.

The operation of the character display method according to the present embodiment will be described below with reference to FIGS. First, the CUP 101 executes the processing of STEP201-STEP204 in accordance with the procedure of FIG. 2, and generates 0-2 multi-gradation data as the ROM data output from the multi-gradation data generating means 104. FIG. Up to now, the operation in FIG. 1 is the same. Next, the data converting means 801 adds data (background data) specifying the background color of the character to be drawn to the generated multi-gradation data. For example, in FIG. 9, three kinds of background data BG of 0, 3, and 6 are added to the multi-gradation data, thereby converting them into the following three data groups.

(Background data = 0) → (Data to be written to frame memory = 0-2)

(Background data = 3) → (Data to be written to frame memory = 3-5)

(Background data = 6) → (Data to be written to frame memory = 6-8)

Instead of STEP205 in FIG. 2, the CUP 101 reads the changed data by the data conversion means 801 and writes it to the frame memory 105. As shown in FIG. The frame memory 105 at this time requires a memory configuration of at least 4 bits per pixel. After that, STEP206 executes the same process. The CUP 101 controls the color map converting means 107 so as to correspond the display color of the data drawn in the frame memory 105 to the predetermined character color for each group. In Figure 9,

Group of (0-2) → background color: green, foreground color: red

(3-5) group → background color: blue, foreground color: white

(6-8) group → background color: orange, foreground color: purple

The display color is composed of three kinds of background colors and foreground colors. The D / A converter 108 outputs this D / B data as an analog signal to the monitor. As described above, the character data converted into the plurality of groups by the data conversion means 801 is controlled by the color adapter conversion means 107 to designate the display color of the characters for each group, thereby reducing the flicker and displaying the plurality of character colors. It becomes possible to realize. The number of colors that can be displayed simultaneously depends on the number of bits per pixel of the frame memory 105. If the permeability per pixel is increased, multi-color character display of this embodiment or more is possible. In the present embodiment, the case of adding data corresponding to the background color of the character as data conversion in the data conversion means 801 has been described. However, in the conversion method of dividing the color map into a plurality of groups, it corresponds to the foreground color. Other conversion methods using data or the like may be used. The present embodiment can also be applied to binary FAX images, and the same effect can be obtained.

Example 3

In the two embodiments of FIG. 1 and FIG. 8, the case where the generated multi gradation data is drawn in the frame memory 105 and the color map conversion means 107 corresponds to the display color has been described. However, if the frame memory 105 can store the data format corresponding to the display color, i.e., full color, the multi-gradation data generated by the multi-gradation data generating means 104 or the data conversion means 801 is a color map. You may draw after converting. 10 shows a block diagram of the multi-gradation character and the image data display device. In FIG. 10, the same code | symbol is attached | subjected about the component which has a function similar to FIG. 1, and description is abbreviate | omitted. The color development means 1001 converts data of multiple gradations into a predetermined display color, and is functionally equivalent to the color map conversion means 107, but displays the display in the color map conversion means 107 as the conversion speed. It may not be as fast as speed. In the following description, the CUP 101 executes the processing of STEP201-STEP204 in accordance with the procedure of FIG. 2, and outputs 0-2 multi-gradation data as ROM data output from the multi-gradation data generating means 104. FIG. Create Up to this point, the operation in FIG. 1 is the same. Next, the color development means 1001 converts the generated multi gradation data into a predetermined display color. For example, as shown in FIG. 3 (d), 0 is converted into a background color 2, a foreground color 1, and a background color corresponding to the middle color of the foreground color. The conversion process in this case is not particularly limited in speed, and can be realized only in software, for example. Instead of STEP205 in FIG. 2, the CUP 101 reads the data converted by the color development means 1001 and writes it to the frame memory 105. FIG.

After that, STEP206 executes the same process. The full color frame memory 105 is read out in raster order by the display readout control means 106, and is output by the D / A converter 108 as an analog video signal. As described above, in a system having a full-color frame memory, the generated multi gradation data is color-developed with the display color and drawn, thereby realizing character display with reduced flicker equivalent to the above-described embodiment.

Example 4

In a system having a full-color frame memory, as another method, color development using a predetermined character color (background color and foreground color), not low-pass filter operation on bit matrix data such as FIG. 1, FIG. 8, and FIG. There is also a method of performing a low pass filter on the color data afterwards. The block diagram in this case is shown in FIG. In addition, in FIG. 11, about the structural part which has a function similar to FIG. 9, the same code | symbol is attached | subjected and description is abbreviate | omitted. The multi-row color data storage means 1101 stores color data after two rows of color development, and the number of bits per pixel differs from the first diagram. For example, if the frame memory 105 is set to 24 bits per pixel (8 bits each), it is stored as color data of 24 bits / pixel. The multi-gradation data generating means 1102 performs the low pass filter operation shown in Equation (1) on the color data after two rows of color development, and generates problem data in which the vertical luminance change including the intermediate color is suppressed. Referring to the operation procedure, the CUP 101 sequentially reads bit matrix data to be drawn from the fonto ROM 102 or the buffer memory 110 from the upstream, and sets it in the color development means 1001. The color development means 1001 develops from the input bit matrix data into color data of two colors, a predetermined background color and a foreground color. This expanded color data is stored in the multi-row color data storage means 1101 sequentially. The multi gradation data generating means 1102 performs the low-pass filter calculation process shown in equation (1) for each bit (pixel) of the color data for 2 rows, so as to smooth the multi gradation data of the vertical luminance change including the intermediate color. Create In this case, since the size of the low pass filter calculation process is large when the ROM has an arithmetic result, it may be configured by an arithmetic circuit or the like based on Equation (1). The CUP 101 reads arithmetic result data from the multi-gradation data generating means 1102 and writes it to the frame memory 105. The drawn data is read out in raster order by the display reading control means 106 and outputted as an analog video signal by the D / A converter 108. In addition, in the present embodiment, the calculation method in the multi-gradation data generating means 1102 may use the number of filters as shown in FIG. As described above, in the present embodiment, it is also possible to perform the color development process first in the system having the full color frame memory, and then perform the low pass filter operation. Also in this case, the character display with the vertical luminance conversion suppressed can be realized similarly to the above-described embodiment, and the line flicker in interlaced scanning can be reduced.

Claims (19)

In a multi-gradation image display method for displaying an image represented by binary pixel data, each pixel of binary pixel data is determined by a predetermined weighting coefficient for data of a first pixel and data of a second pixel adjacent to the first pixel. Comprising a step of generating a multi-tone pixel data by performing calculation on the pixel data, and the step of displaying an image represented by the multi-tone pixel data, the step of displaying an image represented by the multi-tone pixel data, A step of writing multi-gradation pixel data in a frame memory, the step of mapping the multi-gradation pixel data read from the frame memory to a predetermined sum of tones consisting of a foreground color, a background color, and at least one intermediate color, and a combination of the mapped colors Consisting of steps of displaying multi-gradation pixel data in an interlaced scanning method in accordance with The image display method according to claim. 2. The multi-gradation image display method according to claim 1, wherein in the step of generating the multi-gradation pixel data, the first pixel and the second pixel are adjacent to each other in a direction perpendicular to a scanning line of an interlaced scanning method. The method of claim 2, wherein the generating of the multi-gradation pixel data comprises: storing data of the first pixel in the first memory area of the memory means, and storing the first pixel data in the second memory area of the memory means. And storing the second pixel data in the first memory area of the memory means. The method of claim 1, wherein in the step of generating the multi-tone pixel data, a plurality of pixels are adjacent to the first pixel, and one of the plurality of pixels is perpendicular to the interlaced scanning line. And the other one of the plurality of pixels is adjacent to the first pixel in a direction parallel to the scanning line. The multi-gradation image display method according to claim 2, wherein the step of mapping the pixel data to the hue sum is a step of mapping the multi gradation pixel data to the plurality of hue sums. The method of claim 4, wherein the generating of the multi-gradation pixel data comprises: storing the first pixel data in a first memory area of a memory means, and storing the first pixel data in a second memory area of a memory means. And storing second pixel data in the first memory area while storing the multi-gradation image display method. 5. The multi-gradation image display method according to claim 4, wherein the mapping step is a step of mapping the multi-gradation pixel data to a plurality of combinations of colors. In a multi-gradation image display method for displaying an image represented by binary pixel data, each pixel of binary pixel data is determined by a predetermined weighting factor for data of a first pixel and data of a second pixel adjacent to the first pixel. Comprising a step of generating a multi-tone pixel data by performing calculation on the pixel data, and the step of displaying an image represented by the multi-tone pixel data, the step of displaying an image represented by the multi-tone pixel data, Mapping the multi gradation pixel data to a predetermined hue sum consisting of a foreground color, a background color and at least one intermediate color, writing color data indicating the mapped hue sum into the frame memory, and color data by displaying the interlaced scanning method. Multi-gradation image display method comprising the step of displaying. A multi-gradation image display method for displaying an original image including a first pixel having first binary pixel data and a second pixel having second binary pixel data adjacent to the first pixel data, Mapping the binary pixel data to color data representing a predetermined background color and a predetermined foreground color, and performing calculation with a predetermined weighting factor in consideration of the first color data of the first pixel and the second color data of the second pixel. And generating a multi-gradation pixel data for the first pixel data, and displaying an image represented by the multi-gradation pixel data corresponding to the original image. A multi-tone image display apparatus for displaying an image represented by binary pixel data, comprising: a binary pixel data having a predetermined weighting coefficient for data of a first pixel and second pixel data adjacent to the first pixel data; Generating means for generating multi-tone pixel data by performing a calculation on each pixel, and display means for displaying an image represented by the multi-tone pixel data, and for displaying an image represented by the multi-tone pixel data. The display means comprises recording means for recording the multi gradation pixel data in the frame memory, and mapping means for mapping the multi gradation pixel data read from the frame memory to a predetermined sum of hue consisting of a foreground color, a background color and at least one intermediate color. And the display means is based on the display of the interlaced scanning method based on the mapped color tones. The image display device characterized in that the display pixel data. 11. The multi-gradation image display device according to claim 10, wherein the first pixel and the second pixel are adjacent to each other in a direction perpendicular to the interlaced scanning line. 12. The multi-gradation apparatus as claimed in claim 11, wherein the generating means for generating the multi-gradation pixel data comprises a first-in first-out register that operates based on the first pixel data and the second pixel data. Image display device. 11. The method of claim 10, wherein a plurality of pixels are adjacent to the first pixel, one of the plurality of pixels is adjacent to the first pixel in a direction perpendicular to the interlaced scanning line, and another of the plurality of pixels is a scanning line. And the first gradation display device in a direction parallel to the first gradation display device. 12. The multi-gradation image display apparatus according to claim 11, wherein the mapping means maps the multi-gradation pixel data to a plurality of combinations of colors. 15. The multi-gradation image display device according to claim 14, wherein the multi-gradation pixel data is a FIFO type register which operates in accordance with the first pixel data and the second pixel data. The multi-gradation image display apparatus according to claim 13, wherein the mapping means maps a plurality of combinations of colors to multi-gradation pixel data. A multi-tone image display apparatus for displaying an image represented by binary pixel data, comprising: pixels of each binary pixel data by a predetermined weighting coefficient for first pixel data and second pixel data adjacent to the first pixel; Generation means for generating multi-tone pixel data by performing arithmetic operation on the display unit; and display means for displaying an image represented by the multi-tone pixel data, and display means for displaying an image represented by the multi-tone pixel data. Is a mapping means for mapping the multi-gradation pixel data to a predetermined combination of colors consisting of the foreground color, the background color and at least one intermediate color, and recording means for recording the section data indicating the mapped color tone into a frame memory. The display means is characterized by displaying the color data in the display of interlaced scanning method. The image display device. A multi-tone image display apparatus for displaying an original image including a first pixel having first binary pixel data and a second pixel adjacent to the first pixel and having second binary pixel data, Mapping means for mapping binary pixel data into color data representing a predetermined background color and a predetermined foreground color, and calculations are performed on the first color data of the first pixel and the second color data of the second pixel having a predetermined weighting coefficient. Generating means for generating said first pixel multi-tone pixel data; A multi gradation image display apparatus comprising: display means for displaying an image represented by multi gradation pixel data corresponding to an original image. A multi-gradation image display method for displaying on an original image comprising a first pixel having first binary pixel data and a second pixel adjacent to the first pixel and having second binary pixel data; Generating the first pixel multi-tone pixel data by performing an operation on the first binary pixel data of one pixel and the second binary pixel data of the second pixel having a predetermined weighting coefficient; The step of displaying an image represented by the multi-gradation pixel data corresponding to the image, and the step of displaying an image represented by the multi-gradation pixel data corresponding to the original image, converts the multi-gradation pixel data into the frame memory. Steps for recording, mapping to a predetermined hue sum consisting of the foreground color, the background color and at least one intermediate color, and interlaced scanning based on the mapped hue sums It is characterized by being a step of displaying the image display method.